Brake appliance.



Patented 001. 10, I899.

W. T. SHRYDCK. BRAKE APPLIANCE.

(Application 51.4 1rd. 6, 1899.) v

2 Sheats Shaet 2.

(No Model.)

INVEIV TOR ATTORNEYS v I V I r 2 UNITED S arns PATENT OFFICE.

WILLIAM 'r. 'si-IRYooK, OF ALLEGHENY, PENNSYLVANIA.

' BRAKE APPLIANCE.

sPEcIFioATI'oN formingpart of Letters Patent No. 634,704, dated October10, 1899.

' Application filedMarchti,1899. Serial No. 707,929. a. model.)

To all whom it may concern:

Be it known that 1, WILLIAM T. SHRYOOK,

- a citizen of the United States of America, re

siding at Allegheny, in the county-of Allegheny and State ofPennsylania, have invented certain new and useful Improvements in BrakeAppliances, of which the following is a specification, reference beinghad therein to the accompanying drawings.

My invention relates to certain new and useful improvements in car-brakeappliances.

My invention is particularly adapted for use in connection withcar-brakes; and the object thereof is to obtain a more efiectualstoppage when the brake-shoes are applied to the wheels.

In various brakes in use the action thereof upon'the truck-frame whenoperated is that the weight upon the same is partially shifted forwardof the center'of gravity. This shift ing of the weight upon the forwardwheels or pairs of wheels, as the'case may be, in single or doubletrucks increases thereby the pressure of the same upon the rails andremoves a proportional part of pressure from the rear wheels or pairs ofwheels, as the case may be, a

in single or double trucks. This causes what is generally termedskidding of the wheels, oftentimes resulting in the flattening of thesame. To obtain a more efiectual stoppage when the brake is applied, aswell as to overcome the objections heretofore stated,'I increase to'agreater degree the'pressure of the brake-shoes upon the wheels whichhave the closest adhesion to the rails, owing to the shifting of theweightthat is to say, the for ward wheels or pairs of wheels, as thecase may be, in single or double tru cksby means of a compound leveroperating the brakeshoes. 7

' My invention finally consists in the novel combination and arrangementof parts hereinafter more fully described, and particnlarl pointed outin'the claim.

In describing the invention in detail reference is had to theaccompanying drawings, forminga part of this specification, wherein likenumerals of reference indicate corre-' sponding parts throughout theseveral views thereof, and in which- Figure 1. is a side view, partly insection,-

showing my improvedwdevice applied to a truck. Fig. 2 is a top plan viewof a truck, showing my improved device in position and disconnected fromthe draft-rod. Fig. 3 is an enlarged perspective view of the mainbrake-lever. Fig. at is a side view of a portion of .the lower draft-rodconnected 'to the upper portion of the main brake-lever. Fig. 5 is anenlarged perspective view. of the lower draft-rod. Fig. 6 is aperspective view of the compression-rod. ,Fig. 7 is a side view of theconnection for the operating-rod for the rear brake-shoe.

j Referring to the drawings by reference-n umerals, 1 indicates thebottom of a car or other vehicle to which the truck 2 is suitablyconnected. Mounted with the truck 2 in any desirable manner are thefront and rear axles 3, having the wheels L mounted thereon.

4. indicates the rails of a car-track. Gonnected to the inner face 4. ofthe truck, on each side thereof and at the front and rear, are thehangers 5, in which are mounted brake-beams 6 7', having the brake-shoes8 9 loosely connected thereto.

the hollow cylindrical casings 11, which are provided at each end withthe caps 12 13. The cap 13 is formed with a hub 14, which acts as abearing for the lower draft-rod 15, the lower draft-rod 15 being rigidlysecured to the cap 12 and held in position by means of the nut 16. Thecap 12 is interiorly screwthreaded for securingthe sameto the end of thecylindrical casing, as shown. The cap 13 is also interiorlyscrew-threaded for securing the same to the casing 11,'and this cap hasoperating therethrough the auxiliary draftrod 17, on which is mountedthe coiled resistance-spring 18, arranged within the casin g 11. The oneend of this coiled spring is secured to the washer 19, which is mountedon the auxiliary draft-rod 17,'and this washer 19 is secured in positionby means of the nut 20.

' The'outer end of the auxiliary draft-rod 1'7 is formed with a head 21,which is apertured to receive one end of a'chain, rope, or cable 22,which operates over the pulley-wheel 23, supported from the bottom ofthe car, and the opposite end of this chain, rope, or cable22 issuitably connected to the brake-rod 2 1. This brake-rod atits oppositeend is connected to a chain, rope, or cable 25 t0 allow of its oporationby means of the ordinary hand-brake 26 or other suitable means.

27 indicates a hanger for supporting the casings, as well as theauxiliary draft-rod 17. This hanger may be of any desired construction.

The lower draft-rod is provided with an enlarged portion, as at 28,which has arranged therein an elongated slot 29 for connecting the sameby means of a fastening-pin 30 to the main or compound brake-lever. Themain brake-lever is or may be substantially gooseneck in form, as shownat 31, and is provided with an inclined extension or frame 32, withinwhich is arranged the eompressionu'od 33,the upper end thereofprojecting outwardly from the extension or frame, as shown at 34. Thelower end of this rod 33 has seen red thereto the stop-plate 35,conforming to the opening formed in the extension or frame, within whichis mounted the rod 33. At its lower end this opening terminates into anirregular slot 36, thereby forming a shoulder 37, upon which thestop-plate normally rests.

The lower end of the main or compound brake-lever is provided with anaperture 38 for rigidly securing the lever to the brakebeams. Formedintegral with the main brakelever directly beneath the opening 38 is adownwardly-extending projection 39,forming i a lever, having theenlarged end 40, within which is arranged the aperture 41 for securingthereto the operating-rod 42 for the rear brake-shoes. This rod 42 isconnected at its opposite end to the hanger4l",which is formed integralwith the collar 42, mounted on each of the brake-beams 6 7. The upperportion of the main or compound brake-lever is provided with a slot 43,which is adapted to receive a stop-screw 44 for limiting the movement ofthe lower draft-rod 15.

The operation of my improved device is as follows: The brake beingapplied, the brakerod by its connection will draw the auxiliarydraft-rod upwardly, moving the same in a counter direction to themovement of the truck. This compresses the spring within the casing 11and will draw the lower draftrod in the same direction as the auxiliarydraft-rod, which will cause the main or compound brake-lever to move ina counter direction to the movement of the truck, operatin g thebrake-beam and bringing the brakeshoe in engagement with the tread ofthe forward wheels or pairs of wheels, as the case may be, in single ordouble trucks. At the same time on the backward movement of the thrustof the brake-shoes into engagement with the wheels, and by theinterposing of the spring 18 upon the auxiliary draft-rod 17, within thecylinder 11, this spring acts as a cushion to receive the strain causedby applying the brake, effectually removing such strain from thedraft-rod 15, the main brakelever 31, and the brake-shoes, permittingthe latter to be drawn gradually into firm braking engagement with thewheels. It will be observed that when the brake is applied the end ofthe lower draft-rod carrying the pin 30 will ride up in the irregularslot 36 and against the stop-plate 35. This spring will materiallyassist the parts in resuming their normal positions. By applying thebrake-shoes in the manner set forth the same will be brought into a moreeifective engagement with the wheels to prevent the skidding-of thelatter, as the pressure of the brake-shoes has been regulated by themanner of application to conform to the shifting ofthe weight upon theforward wheels or pairs of wheels, as the case may be. This regulationof the pressure is attained by reason of the arrangement of the compoundlever in the manner shownthat is, the upper arm thereof being of greaterlength than the lower one, or, in other words, the fulcrum-point of thelever being near the lower end thereof-therefore the upper arm of thelever operating in a counter direction to which the car is moving willcause the application of the forward brake-shoes in the same direction,and owing to the compound lever being fulcrumed in the manner shown thebrake-shoes will engage the .wheels with a greater pressure than ifarranged otherwise and obtain a more efficient braking action.Simultaneously with the application of the brake-shoes to the forwardwheels of the truck the brake-rod 42, owing to its connection with thelower arm of the compound lever, will cause the rear brake-shoes toengage the rear wheels of the truck. It will also be observed that whenthe brake is applied the pressure of the brake-shoes upon the forwardwheels or pairs of wheels, as the case may be, in single or doubletrucks will be immediately obtained without jarring, owing, asheretofore stated, to the cushioning of the draftrods, and that the rearbrake-shoes will be brought into engagement with the rear wheels orpairs of wheels, as the case may be, in single or double trucks.

Itis thought that the many advantages of my improved device can bereadilyunderstood from the foregoing description,taken in connectionwith the accompanying drawings, by the use of a compound lever foroperating a brake, thereby bringing excessive pressure of thebrake-shoes upon the forward wheels or pairs of wheels, as the case maybe.

It will be noted that various changes may be made in the details ofconstruction without departing from the general spirit'of my invention.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is

In a car-brake, a brake-rod operating in the direction the car-truck ismoving, an auxil- 5 iarydraft-rod suitably connected thereto andoperating in an opposite direction, a lower draft-rod operating in thesame direction, a'

' cushioning connectionhetween the said draftdraft-rod when the same isbrought into en-' gagement with the lower draft-rod, means arranged inthe said lever for limiting the movement of the lower draft-rod, aforward brakeshoe, a brake-beam connected to the said lever and operatedthereby so as to cause the said brake-shoe to engage the forward side ofthe forward wheel or wheels of a car-truck, a rear brake-shoe,connection between the said rear brake-shoe and compound lever adaptedto be operated by the said lever so as to cause the rear brake-shoe toengage the rear side of the rear wheel or wheels of a car-truck,substantially as set forth.

In testimony whereof I affix my signature in the presence of twowitnesses.

. WILLIAM T. SHRYOOK.

Witnesses:

J OHN NOLAND, E, W. ARTHUR.

